What's all this with Sainsburys ?
How come the 2 disc edition dvd is only available at Sainsburys ?
Mad,Bad And Dangerous To Know...
Sainsbury's do exclusives every now and then. Not sure how they tend to be organised, but they've done two disc versions of The Amazing Spider-Man, The Muppets, Mission Impossible 4, Snow White and the Huntsman, Pirates of the Caribbean 4, and a few others.
While the likes of HMV have done a few exclusives like this in their time, I can't think of any other supermarket chain that has done. They tend to be good value, though I'd strongly advise against pre-ordering from their site.